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CVE-2025-54589 — copyparty Reflected XSS via Filter Parameter

Affected: 9001 copyparty

Copyparty is a portable file server. In versions 1.18.6 and below, when accessing the recent uploads page at `/?ru`, users can filter the results using an input field at the top. This field appends a filter parameter to the URL, which reflects its value directly into a `<script>` block without proper escaping, allowing for reflected Cross-Site Scripting (XSS) and can be exploited against both authenticated and unauthenticated users. This is fixed in version 1.18.7.

GHSA-8mx2-rjh8-q3jq — copyparty Reflected XSS via Filter Parameter

Affected: PyPI: copyparty

### Summary Unauthorized reflected Cross-Site-Scripting when accessing the URL for recent uploads with the `filter` parameter containing JavaScript code.

### Details When accessing the recent uploads page at `/?ru`, users can filter the results using an input field at the top. This field appends a filter parameter to the URL, which reflects its value directly into a `<script>` block without proper escaping. This vulnerability allows for reflected Cross-Site Scripting (XSS) and can be exploited against both authenticated and unauthenticated users, enabling unwanted actions in the victims browser.

### PoC A URL like this will execute `alert(1)`: ``` https://127.0.0.1:3923/?ru&filter=</script><script>alert(1)</script> ```

PYSEC-2026-1276 — copyparty Reflected XSS via Filter Parameter

Affected: PyPI: copyparty

### Summary Unauthorized reflected Cross-Site-Scripting when accessing the URL for recent uploads with the `filter` parameter containing JavaScript code.

### PoC A URL like this will execute `alert(1)`: ``` https://127.0.0.1:3923/?ru&filter=</script><script>alert(1)</script> ```